Refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function

ABSTRACT

The present invention relates to a refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function, comprising a support frame, a refrigeration mechanism, an expandable heat preservation table top and an air filtration mechanism; the refrigeration mechanism comprising a heat preservation box, a storage box, a first air pump and a heat spreader; the expandable heat preservation table top provided thereon with a heat equalizing plate and a control panel; the air filtration mechanism comprising a second air pump, a solid filter tank, a liquid filter tank, a controller and a battery; the solid filter tank provided therein with an air quality sensor group, an intake pipe and activated carbon; the liquid filter tank provided therein with a float switch, an electronically controlled hydraulic check valve, an outlet pipe and a tilt sensor. The present invention is a refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function, which has a reasonable structure and the advantages of simple structure, convenient use, high level of intelligence, and good heat preservation effect, effectively solving the problem of existing heat preservation tables having only a single function.

FIELD OF THE INVENTION

The present invention relates to the field of intelligent household appliances, in particular a refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function.

BACKGROUND

In daily household life, the problem of food getting cold due to heat dissipation has been plaguing people's diet and health. The problem of food getting cold easily is more serious especially in cold winter or high and cold regions. In the prior art, regarding this problem, the existing inventions have suggested some solutions for heating and heat preservation, but these solutions usually involves simply disposing an electric heating tray or other electric heating devices on the table, which is not very practical. In summer or other environments where heating and heat preservation is not needed, the products according to these solutions generally do not have other functions, so they can only be used as decorative items. During heating and heat preservation, each part of the table does not have a uniform temperature, which not only has a high power consumption, low level of intelligence and single functionality, but also is likely result in electric shock or fire upon careless operation. Therefore, a heat preservation table with a high level of intelligence, safety and reliability, versatility and practicability is needed.

SUMMARY

The technical problem to be solved by the present invention is: to overcome the problem described above, a refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function is provided, which has a reasonable structure and the advantages of simple structure, convenient use, high level of intelligence, and good heat preservation effect, effectively solving the problem of existing heat preservation tables having only a single function.

The technical solution adopted by the present invention to solve the technical problem thereof is: a refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function comprising a support frame having a frame structure, a refrigeration mechanism, an expandable heat preservation table top and an air filtration mechanism. The support frame is provided thereon with a first cavity, a second cavity and a third cavity. The first cavity, the second cavity and the third cavity are provided thereon with an opening. The first cavity and second cavity are further provided thereon with an opening on the side, respectively.

The refrigeration mechanism is disposed within the first cavity, the refrigeration mechanism comprising a heat preservation box with a single opening, a storage box sleeved with and slidably coupled to the heat preservation box, a first air pump fixedly disposed on the support frame and a heat spreader. The heat preservation box and support frame are filled therebetween with a heat preservation material except for the upper end surface. The opening of the heat preservation box faces the side opening of the first cavity.

The heat spreader is disposed on an upper end surface of the heat preservation box. The heat spreader comprises two connection plates disposed in parallel with each other, and a plurality of fin plates disposed between the connection plates and connected to each other perpendicularly. Both ends of the heat spreader are respectively provided with a connection cover in communication with a gap between the fin plates. Both ends of the connection cover are respectively connected to an air outlet of the first air pump and the support frame externally. The surfaces of the connection plates are respectively provided with a semiconductor cooling sheet, and a heat absorbing end of the semiconductor cooling sheet is disposed facing a side of the heat preservation box.

The expandable heat preservation table top is disposed above the support frame. A side of the expandable heat preservation table top is connected to a plurality of expansion plates through a hinge. A bottom of the expandable heat preservation table top is disposed with a heat equalizing plate. An end of the heat equalizing plate is connected to a heat releasing end of the semiconductor cooling sheet. A control panel is disposed above the expandable heat preservation table top.

The air filtration mechanism is disposed within the third cavity. The air filtration mechanism comprises a second air pump with an air inlet connected to the outside, a solid filter tank, a liquid filter tank, a controller and a battery.

The solid filter tank is divided into a fourth cavity and a fifth cavity by a screen. The fourth cavity is provided therein with an air quality sensor group and an intake pipe connected to the air outlet of the second air pump. The fifth cavity is filled with activated carbon. The liquid filter tank is divided into a sixth cavity and a seventh cavity communicating with the fifth cavity by a partition plate. The seventh cavity is provided therein a float switch and filled with distilled water with a disinfectant. The sixth cavity is provided therein with an electronically controlled hydraulic check valve in communication with an upper end of the seventh cavity and an outlet pipe in communication with the air inlet of the first air pump. The outlet pipe simultaneously communicates with the outside of the support frame. The partition plate between the sixth cavity and the seventh cavity is provided thereon with a tilt sensor.

Further, the support frame is made of a mesh plate and/or a solid plate material.

Further, the heat preservation box is made of at least two layers of housings sleeved with each other in a sealed manner. The cavity between the housings is vacuumed. The upper end housing of the heat preservation box is not provided with a cavity, and a rim made of a magnetic material is provided along the opening of the heat preservation box.

Further, the storage box is annularly provided with a sealing member adapted to the edge of the opening of the heat preservation box. The sealing member comprises a hollow sealing strip and a plurality of strip magnets disposed in the inner cavity of the hollow sealing strip.

Further, the gap between the fin plates is provided with a heating wire on a side close to the heat preservation table top, and the thickness of the heating wire does not exceed half of the height of the fin plates.

Further, the bottom of the expandable heat preservation table top is provided with a plurality of temperature sensors.

Further, the second cavity is provided therein, through sliding connection by a slide rail, with a plurality of depository boxes which can be drawn out from the side opening of the second cavity.

Further, a gas pressure rod for supporting is disposed between the expansion plates and the support frame, and a groove for accommodating the gas pressure rod is disposed on the expansion plates.

Further, the controller is electrically connected to the first air pump, the semiconductor cooling sheet, the control panel, the second air pump, the battery, the air quality sensor group, the float switch, the tilt sensor, the electronically controlled hydraulic check valve, the heating wire, and the temperature sensors, respectively.

Further, the air quality sensor group comprises a temperature and humidity sensor, a carbon dioxide sensor, a carbon monoxide sensor, a PM sensor, and a volatile organic compound detector.

The beneficial effect of the present invention is: a refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function comprising a support frame having a frame structure, a refrigeration mechanism, an expandable heat preservation table top and an air filtration mechanism. The support frame is used for supporting the refrigeration mechanism, the expandable heat preservation table top and the air filtration mechanism, as well as enclosing the components of the refrigeration mechanism and the air filtration mechanism to prevent direct contact with the user and avoid electric shock. The refrigeration mechanism is used for refrigerating food or other items, and the heat dissipated by the refrigeration mechanism can be selectively used for the heat source supply of the expandable heat preservation table top. The bottom of the expandable heat preservation table top is provided with a heating wire and a heat equalizing plate connected thereto to make the temperature of the table surface more uniform. The air filtration mechanism adopts multi-stage filtration, the sensors monitor the air quality, and the controller controls the operation of each component in a unified manner, which is highly intelligent. It has a reasonable structure and the advantages of simple structure, convenient use, high level of intelligence, safety and reliability and good heat preservation effect, effectively solving the problem of existing heat preservation tables having only a single function.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will now be further described with reference to the drawings and embodiments.

FIG. 1 is a schematic view showing the overall appearance and structure of a refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function according to the present invention;

FIG. 2 is a schematic view showing the structure of the support frame of a refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function according to the present invention;

FIG. 3 is a schematic view showing the overall longitudinal cross sectional structure of a refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function according to the present invention;

FIG. 4 is a schematic view showing the overall transverse cross sectional structure of a refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function according to the present invention;

FIG. 5 is a schematic view showing the structure of the refrigeration mechanism of a refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function according to the present invention;

FIG. 6 is a schematic view showing the connection structure between the storage box and the sealing member of a refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function according to the present invention;

FIG. 7 is a schematic view showing the structure of the heat spreader of a refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function according to the present invention;

FIG. 8 is a schematic view showing the internal structure of the solid filter tank and the liquid filter tank of a refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function according to the present invention;

The reference numerals in the drawings are as follows: 1. support frame, 11. first cavity, 12. second cavity, 121. depository boxes, 122. slide rail, 13. third cavity, 2. refrigeration mechanism, 21. heat preservation box, 22. storage box, 23. sealing member, 231. strip magnets, 232. hollow sealing strip, 24. heat preservation material, 25. first air pump, 26. semiconductor cooling sheet, 27. heat spreader, 271. connection cover, 272. connection plates, 273. fin plates, 274. heating wire, 3. expandable heat preservation table top, 31. expansion plates, 311. gas pressure rod, 312. groove, 32. hinge, 33. control panel, 34. temperature sensors, 35. heat equalizing plate, 4. air filtration mechanism, 41. second air pump, 42. solid filter tank, 421. fourth cavity, 4211. intake pipe, 4212. air quality sensor group, 422. fifth cavity, 43. liquid filter tank, 431. sixth cavity, 4311. electronically controlled hydraulic check valve, 4312. tilt sensor, 4313. outlet pipe, 432. seventh cavity, 4321. float switch, 44. controller, 45. battery.

DETAILED DESCRIPTION

The present invention will now be described in further detail with reference to the drawings. The drawings are simplified schematic views. The basic structure of the present invention is illustrated merely in a schematic manner. Therefore, only the configurations related to the present invention are shown.

As shown in FIGS. 1, 3 and 4, a refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function comprises a support frame 1 having a frame structure, a refrigeration mechanism 2, an expandable heat preservation table top 3 and an air filtration mechanism 4.

As shown in FIG. 2, the support frame 1 is provided thereon with a first cavity 11, a second cavity 12 and a third cavity 13. The first cavity 11, second cavity 12 and third cavity 13 are respectively provided thereon with an opening, and the first cavity 11 and second cavity 12 are respectively further provided thereon with an opening on the side.

As shown in FIG. 3 and FIG. 5, the refrigeration mechanism 2 is disposed within the first cavity 1. The refrigeration mechanism 2 comprises a heat preservation box 21 with a single opening, a storage box 22 sleeved with and slidably coupled to the heat preservation box 21, a first air pump 25 fixedly disposed on the support frame 1 and a heat spreader 27. The heat preservation box 21 and support frame 1 are filled therebetween with a heat preservation material 24 except for the upper end surface. The opening of the heat preservation material 21 faces the side opening of the first cavity 11.

As shown in FIG. 7, the heat spreader 27 is disposed on an upper end surface of the heat preservation box 21. The heat spreader 27 comprises two connection plates 272 disposed in parallel with each other, and a plurality of fin plates 273 disposed between the connection plates 272 and connected to each other perpendicularly. Both ends of the heat spreader 27 are respectively provided with a connection cover 271 in communication with a gap between the fin plates 273. Both ends of the connection cover 271 are respectively connected to an air outlet of the first air pump 25 and support frame 1 externally.

As shown in FIG. 3, the surfaces of the connection plates 272 are respectively provided with a semiconductor cooling sheet 26, and a heat absorbing end of the semiconductor cooling sheet 26 is disposed facing a side of the heat preservation box 21.

The heat spreader 27 and the semiconductor cooling sheet 26 cooperate to discharge the heat energy inside the heat preservation box 21 out of the heat preservation box 21 and conduct the heat energy. The first air pump 25 is used for discharging the heat energy on the heat spreader 27 out of the first cavity 11.

The expandable heat preservation table top 3 is disposed above the support frame 1. A side of the expandable heat preservation table top 3 is connected to a plurality of expansion plates 31 through a hinge 32. A bottom of the expandable heat preservation table top 3 is disposed with a heat equalizing plate 35. An end of the heat equalizing plate 35 is connected to a heat releasing end of the semiconductor cooling sheet 26. A control panel 33 is disposed above the expandable heat preservation table top 3.

When heating and heat preservation is required, the first air pump 25 is turned off. With the cooperation between the heat spreader 27 and the semiconductor cooling sheet 26, the heat energy conducted in the heat preservation box 21 is conducted to the heat equalizing plate 35, and then uniformly conducted onto the expandable heat preservation table top.

As shown in FIG. 4, the air filtration mechanism 4 is disposed within the third cavity 13. The air filtration mechanism 4 comprises a second air pump 41 with an air inlet connected to the outside, a solid filter tank 42, a liquid filter tank 43, a controller 44 and a battery 45. The control panel 33 is used for sending a control command to the controller 44. The battery 45 is used for emergency power supply in the case of power outage. When the power supply is normal, the battery 45 is in a charging state until it is full.

As shown in FIG. 8, the solid filter tank 42 is divided into a fourth cavity 421 and a fifth cavity 422 by a screen. The fourth cavity 421 is provided therein with an air quality sensor group 4212 and an intake pipe 4211 connected to the air outlet of the second air pump 41. The fifth cavity 422 is filled with a mixture or a pure substance of activated carbon and zeolite for absorbing harmful substances in the air. Depending on the substance to be adsorbed, the filler in the fifth cavity 422 should also be replaced or added with materials having the respective adsorption function. Of course, the application relationship between these adsorption materials and the adsorbed materials should be known and disclosed. The air quality sensor group 4212 is used for monitoring the current air quality, and sending monitoring data to the controller 44.

The liquid filter tank 43 is divided into a sixth cavity 431 and a seventh cavity 432 communicating with the fifth cavity 422 by a partition plate. The seventh cavity 432 is provided therein with a float switch 4321 and filled with distilled water with a disinfectant. The distilled water with a disinfectant is used for killing bacteria that cannot be killed by the solid filter tank 42 and filtering out fine dust that cannot be adsorbed by the solid filter tank 42. The sixth cavity 431 is provided therein with an electronically controlled hydraulic check valve 4311 in communication with an upper end of the seventh cavity 432 and an outlet pipe 4313 in communication with the air inlet of the first air pump 25. The outlet pipe 4313 simultaneously communicates with the outside of the support frame 1. The partition plate between the sixth cavity 431 and the seventh cavity 433 is provided thereon with a tilt sensor 4312.

In an embodiment, the support frame 1 is made of a mesh plate and/or a solid plate material, i.e. the support frame 1 is made of a mesh plate or a solid plate material alone, or may be made of both mesh plate and solid plate which are mixed and connected.

In an embodiment shown in FIGS. 5 and 6, the heat preservation box 11 is made of at least two layers of housings sleeved with each other in a sealed manner. The cavity between the housings is vacuumed to enhance the heat preservation effect. The upper end housing of the heat preservation box 21 is not provided with a cavity, and a rim made of magnetic material is provided along the opening of the heat preservation box 21.

The storage box 22 is annularly provided with a sealing member 23 adapted to the edge of the opening of the heat preservation box 11. The sealing member 23 comprises a hollow sealing strip 232 and a plurality of strip magnets 231 disposed in the inner cavity of the hollow sealing strip 232. The strip magnets 231 and the magnetic rim provided along the opening of the heat preservation box 21 attract and connect to each other to seal the hollow sealing strip to the opening of the heat preservation box 21.

In an embodiment as shown in FIG. 7, the gap between the fin plates 273 is provided with a heating wire 274 for assisting in heating on a side close to the heat preservation table top 3, and the thickness of the heating wire 274 does not exceed half of the height of the fin plates 273 to ensure that the gap between the fin plates 273 is sufficient for the first air pump 25 to dissipate heat for the heat spreader 27.

In an embodiment as shown in FIG. 3, the bottom of the expandable heat preservation table top 3 is provided with a plurality of temperature sensors 34 for detecting the temperature of each part of the expandable heat preservation table top 3 and sending the detection information to the controller 44. In a possible embodiment, the bottom of the expandable heat preservation table top 3 is further provided with a pressure sensor and/or an infrared proximity sensor for detecting whether the food is placed on the expandable heat preservation table top 3.

In an embodiment as shown in FIG. 3, the second cavity 12 is provided therein, through sliding connection by a slide rail 122, with a plurality of depository boxes 121 which can be drawn out from the side opening of the second cavity 12. In a possible embodiment, the ends of the depository boxes 121 and the storage box 22 facing the outside are tilted upward, i.e. the depository boxes 121 and the storage box 22 are disposed obliquely with respect to the horizontal plane.

In an embodiment as shown in FIG. 3, a gas pressure rod 311 for supporting is disposed between the expansion plates 31 and the support frame 1, and a groove 312 for accommodating the gas pressure rod 311 is disposed on the expansion plates 31. In a possible embodiment, the gas pressure rod 311 may be replaced by an integral rod hinged at one end to the expansion plates 31 or support frame 1. The other end of the rod abuts against the support frame 1 or the expansion plates 31. In another possible embodiment, the gas pressure rod 311 can be also replaced by an integral rod, both ends of which respectively abut against the expansion plates 31 and the support frame 1.

In an embodiment, the controller 44 is electrically connected to the first air pump 25, the semiconductor cooling sheet 26, the control panel 33, the second air pump 41, the battery 45, the air quality sensor group 4212, the float switch 4321, the tilt sensor 4312, the electronically controlled hydraulic check valve 4311, the heating wire 274, and temperature sensors 34, respectively.

The controller 44 is provided thereon with a charging and discharging circuit, and is electrically connected to the battery 45 through the charging and discharging circuit. When the air quality sensor group 4212 detects that the control quality is not good, the controller 44 controls to turn on the second air pump 41 and the electronically controlled hydraulic check valve 4311 to filter the air.

The float switch 4321 is used for monitoring the volume of the distilled water with a disinfectant in the liquid filter tank 43 to prevent it from clogging the electronically controlled hydraulic check valve 4311, and displaying through the control panel 33 and reminding the user of the change in volume by sound or an indicator light.

The tilt sensor 4312 is used for detecting the levelness of the liquid filter tank 43. When it is detected that the liquid filter tank 43 is tilted more than a certain angle, the controller turns off the electronically controlled hydraulic check valve 4311 and the second air pump 41 to prevent the distilled water with a disinfectant from leaking.

In the heating and heat preservation state, the controller 44 detects through the temperature sensors 34 that the temperature on the expandable heat preservation table top is insufficient for maintaining the temperature, the controller 44 turns off the first air pump 25 and turns on the semiconductor cooling sheet 26 to conduct the heat in the heat preservation box 21 to the expandable heat preservation table top 3 for heat preservation. If it is still insufficient for heat preservation, the controller 44 controls to turn on the heating wire 274 to assist in providing heat energy until the heat preservation temperature is reached.

In the non-heating and heat preservation state, the controller 44 turns off the first air pump 25 and turns on the semiconductor cooling sheet 26 to conduct the heat in the heat preservation box 21 to the heat spreader 27, and the controller 44 turns on the first air pump 25 to discharge the heat in the heat spreader 27 out of the support frame 1.

The control panel 33 sends a control command directly to the control panel 44 to turn off, turn on or adjust the specific actions of the controlled mechanism. In an embodiment, the air quality sensor group 4212 comprises but is not limited to a temperature and humidity sensor, a carbon dioxide sensor, a carbon monoxide sensor, a PM2.5 sensor, and a volatile organic compound detector.

The refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function according to the present invention comprises a support frame having a frame structure, a refrigeration mechanism, an expandable heat preservation table top and an air filtration mechanism. The support frame is used for supporting the refrigeration mechanism, the expandable heat preservation table top and the air filtration mechanism, as well as enclosing the components of the refrigeration mechanism and the air filtration mechanism to prevent direct contact with the user and avoid electric shock. The refrigeration mechanism is used for refrigerating food or other items, and the heat dissipated by the refrigeration mechanism can be selectively used for the heat source supply of the expandable heat preservation table top. The bottom of the expandable heat preservation table top is provided with a heating wire and a heat equalizing plate connected thereto to make the temperature of the table surface more uniform. The air filtration mechanism adopts multi-stage filtration, the sensors monitor the air quality, and the controller controls the operation of each component in a unified manner, which is highly intelligent. It has a reasonable structure and the advantages of simple structure, convenient use, high level of intelligence, safety and reliability and good heat preservation effect, effectively solving the problem of existing heat preservation tables having only a single function.

In view of the ideal embodiments of the present invention described above, those skilled in the art can make various changes and modifications to the invention without departing from the scope of the present invention. The technical scope of the present invention is not limited to the disclosure of the specification, and should be determined according to the scope of the claims. 

What is claimed is:
 1. A refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function, characterized in that: comprising a support frame (1) having a frame structure, a refrigeration mechanism (2), an expandable heat preservation table top (3) and an air filtration mechanism (4), the support frame (1) provided thereon with a first cavity (11), a second cavity (12) and a third cavity (13), the first cavity (11), the second cavity (12) and the third cavity (13) respectively provided thereon with an opening, the first cavity (11) and the second cavity (12) further provided thereon with an opening on the side, respectively; the refrigeration mechanism (2) is disposed within the first cavity (1), the refrigeration mechanism (2) comprising a heat preservation box (21) with a single opening, a storage box (22) sleeved with and slidably coupled to the heat preservation box (21), a first air pump (25) fixedly disposed on the support frame (1) and a heat spreader (27); the heat preservation box (21) and support frame (1) are filled therebetween with a heat preservation material (24) except for an upper end surface, the opening of the heat preservation box (21) facing the side opening of the first cavity (11); the heat spreader (27) is disposed on the upper end surface of the heat preservation box (21), the heat spreader (27) comprising two connection plates (272) disposed in parallel with each other, a plurality of fin plates (273) disposed between the connection plates (272) and connected to each other perpendicularly; both ends of the heat spreader (27) are respectively provided with a connection cover (271) in communication with a gap between the fin plates (273), both ends of the connection cover (271) respectively connected to an air outlet of the first air pump (25) and the support frame (1) externally; the surfaces of the connection plates (272) are respectively provided with a semiconductor cooling sheet (26), and a heat absorbing end of the semiconductor cooling sheet (26) is disposed facing a side of the heat preservation box (21); the expandable heat preservation table top (3) is disposed above the support frame (1), a side of the expandable heat preservation table top (3) connected to a plurality of expansion plates (31) through a hinge (32), a bottom of the expandable heat preservation table top (3) disposed with a heat equalizing plate (35), an end of the heat equalizing plate (35) connected to a heat releasing end of the semiconductor cooling sheet (26); a control panel (33) is disposed above the expandable heat preservation table top (3); the air filtration mechanism (4) is disposed within the third cavity (13), the air filtration mechanism (4) comprising a second air pump (41) with an air inlet connected to the outside, a solid filter tank (42), a liquid filter tank (43), a controller (44) and a battery (45); the solid filter tank (42) is divided into a fourth cavity (421) and a fifth cavity (422) by a screen, the fourth cavity (421) provided therein with an air quality sensor group (4212) and an intake pipe (4211) connected to the air outlet of the second air pump (41), the fifth cavity (422) filled with activated carbon; the liquid filter tank (43) is divided into a sixth cavity (431) and a seventh cavity (432) communicating with the fifth cavity (422) by a partition plate, the seventh cavity (432) provided therein with a float switch (4321) and filled with distilled water with a disinfectant, the sixth cavity (431) provided therein with an electronically controlled hydraulic check valve (4311) in communication with an upper end of the seventh cavity (432) and an outlet pipe (4313) in communication with the air inlet of the first air pump (25), the outlet pipe (4313) simultaneously communicating with the outside of the support frame (1), the partition plate between the sixth cavity (431) and the seventh cavity (433) provided thereon with a tilt sensor (4312).
 2. A refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function of claim 1, characterized in that: the support frame (1) is made of a mesh plate and/or a solid plate material.
 3. A refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function of claim 1, characterized in that: the heat preservation box (11) is made of at least two layers of housings sleeved with each other in a sealed manner, the cavity between the housings vacuumed, the upper end housing of the heat preservation box (21) not provided with a cavity, a rim made of a magnetic material provided along the opening of the heat preservation box (21).
 4. A refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function of claim 1, characterized in that: the storage box (22) is annularly provided with a sealing member (23) adapted to the edge of the opening of the heat preservation box (11), the sealing member (23) comprising a hollow sealing strip (232) and a plurality of strip magnets (231) disposed in the inner cavity of the hollow sealing strip (232).
 5. A refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function of claim 1, characterized in that: the gap between the fin plates (273) is provided with a heating wire on a side close to the heat preservation table top (3), and the thickness of the heating wire (274) does not exceed half of the height of the fin plates (273).
 6. A refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function of claim 1, characterized in that: the bottom of the expandable heat preservation table top (3) is provided with a plurality of temperature sensors (34).
 7. A refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function of claim 1, characterized in that: the second cavity (12) is provided therein, through sliding connection by a slide rail (122), with a plurality of depository boxes (121) which can be drawn out from the side opening of the second cavity (12).
 8. A refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function of claim 1, characterized in that: a gas pressure rod (311) for supporting is disposed between the expansion plates (31) and the support frame (1), and a groove (312) for accommodating the gas pressure rod (311) is disposed on the expansion plates (31).
 9. A refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function of claim 1, characterized in that: the controller (44) is electrically connected to the first air pump (25), the semiconductor cooling sheet (26), the control panel (33), the second air pump (41), the battery (45), the air quality sensor group (4212), the float switch (4321), the tilt sensor (4312), the electronically controlled hydraulic check valve (4311), the heating wire (274), and the temperature sensors (34), respectively.
 10. A refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function of claim 1, characterized in that: the air quality sensor group (4212) comprises a temperature and humidity sensor, a carbon dioxide sensor, a carbon monoxide sensor, a PM2.5 sensor, and a volatile organic compound detector.
 11. A refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function of claim 5, characterized in that: the controller (44) is electrically connected to the first air pump (25), the semiconductor cooling sheet (26), the control panel (33), the second air pump (41), the battery (45), the air quality sensor group (4212), the float switch (4321), the tilt sensor (4312), the electronically controlled hydraulic check valve (4311), the heating wire (274), and the temperature sensors (34), respectively.
 12. A refrigeration-heating cycle expandable heat preservation table with an intelligent air filtration function of claim 6, characterized in that: the controller (44) is electrically connected to the first air pump (25), the semiconductor cooling sheet (26), the control panel (33), the second air pump (41), the battery (45), the air quality sensor group (4212), the float switch (4321), the tilt sensor (4312), the electronically controlled hydraulic check valve (4311), the heating wire (274), and the temperature sensors (34), respectively. 